0,2
Vincenzo Librandi, Table of n, a(n) for n = 0..35
a(n) = d^n * product(d^n - d^k, k=0..n-1).
FoldList[ #1*6^#2 (6^#2-1)&, 1, Range[ 20 ] ]
Sequence in context: A006473 A115459 A135421 * A231815 A291995 A005801
Adjacent sequences: A028665 A028666 A028667 * A028669 A028670 A028671
nonn
Olivier Gérard
approved