[seqfan] Re: [math-fun] Triangular+Triangular = Factorial

N. J. A. Sloane njas at research.att.com
Wed Oct 13 04:08:07 CEST 2010


I see Georgi Guninski has factored 4*(93!)+1 !
Could someone kindly send in the appropriate updates for these sequence:

factorial numbers, as a sum of two triangular numbers: A180590. A152089, A171099

(that's from the Index to the OEIS)

Thanks!

Neil

>Date: Mon, 11 Oct 2010 22:11:32 +0300
>From: Georgi Guninski <guninski at guninski.com>
>Subject: [seqfan] Re: [math-fun] Triangular+Triangular = Factorial
>4*(93!)+1 factors as:

>22264972703599697
>x
>564349575553931084958423784746992365005933557499014263
>x
>368245611380366470204137455967783333710630200370039653145900163583660896791

>the sequence is ready to 109:

>93(-),94(-),95(+4),96(+3),97(-),98(-),99(+6),100(-),101(-),102(+5),103(-),104(-),105(-),106(-),107(-),108(-)

>list of factors is at:
>http://stefan.guninski.com/seq/guyres2.txt





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