66781

Appears in sequences

• Star numbers (A003154) whose digital sum and product of nonzero digits are both triangular numbers.at n=6A083748
• Crystal ball sequence for the A2 x A2 lattice.at n=14A143008
• Integer k associated with the conjectured record-breaking maximal value A226681(n) of the minimal elements of primitive Collatz-like 3x-k cycles.at n=10A226682
• Integer k associated with the conjectured record-breaking maximal element A226683(n) of primitive 3x-k cycles.at n=11A226684
• Integer k associated with the conjectured record-breaking length A226686(n) of primitive Collatz-like 3x-k cycles.at n=12A226687
• Number of bicolored graphs on n unlabeled nodes such that black nodes are not adjacent to each other and every white node is adjacent to a black node.at n=8A340021