1, 5, 49, 1261, 62689, 7629469, 1294716361, 375074829229,

[ZAKIRS]

Dear SeqFan members,

suprisingly, this sequence's absent in OEIC:

1, 5, 49, 1261, 62689, 7629469, 1294716361, 375074829229, 
  135662633811769, 71859617272521901,

before posting it to Neil, i dare ask you to find out

what it can be (kind of puzzle?), thanks, zak

ps sure i know answer so i'm puzzled that this SEQ's absent in OEIC.