A367601 a(n) is the number of terms in the analog of A121805 but starting with A037124(n), or -1 if that sequence is infinite.

2137453, 194697747222394, 2, 199900, 19706, 209534289952018960, 15, 198104936410, 19511030, 20573, 19278442756937613, 207556412347088426, 2153441655319779164332, 1960210914, 204, 19, 195607586, 21, 19511029, 1922379655900, 15, 1979, 191782579276710577865, 1927

Offset: 1

Author

Michael S. Branicky and N. J. A. Sloane, Dec 06 2023

Keywords

• nonn
• base

Comments

This is by definition a subsequence of A330128.

Links

• Michael S. Branicky, Table of n, a(n) for n = 1..1000
• Michael S. Branicky, Table of indices and record highs in A367601

Crossrefs

Cf. A037124, A121805, A330128, A330129, A367364, A367365.

For records see A367602 and A367603.