A367604 Length of commas sequence (cf. A121805) if start at 1 and do the calculations in base n; or -1 if the sequence is infinite.

-1, 17, 2, 1259, 3243760, 33779, 8367, 3, 2137453, 29347, 4, 27, 3097837317, 75455289096, 144693554136426354, 586, 8250248375768635503445567685, 4956282, 51496560713, 7977231, 4, 560002, 48, 779641, 10712620148411, 44948082868036315658034347512222651

Offset: 2

Author

N. J. A. Sloane, Dec 08 2023

Keywords

• sign
• base

Crossrefs

Cf. A121805, A367605 (last term).

The sequences for bases 3, 8, and 10 are A367355, A367344, and A121805.

Extensions

More terms from Michael S. Branicky, Dec 08 2023