Dear seqfans, Note that A100000 shows only the "Middle column" of Ishango bone. In contrast, the new sequence lists all terms, for example we can see the repeated terms 5, 11 and 19, which are the first three primes of the form n^2 - n - 1 (Cf. A002327). Note that there are 62.5 % of prime numbers in the sequence. This is interesting. Best regards, Omar E. Pol