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A353727
Index in A353715 of the first term divisible by 2^n and no higher power of 2, or -1 if no such term exists.
3
0, 2, 3, 11, 54, 74, 88, 183, 20334, 30938, 21247, 90575, 3913, 124845, 2643790, 5828721, 2469947, 4005550, 19917707
OFFSET
0,2
EXAMPLE
Table showing initial values of n (column 1) and a(n) (column 3).
The central column shows the corresponding entry of A353715 written in base 2.
The entries in column 2 end in exactly n zeros.
n A353715(a(n)) a(n)
0 1 0
1 110 2
2 1100 3
3 1101000 11
4 11110000 54
5 1111100000 74
6 11101000000 88
7 110110000000 183
8 1111110101100000000 20334
9 10111110101000000000 30938
10 1111111110000000000 21247
11 1001111111100000000000 90575
12 11111000000000000 3913
13 10011111110000000000000 124845
14 111110111110100000000000000 2643790
15 10011111111111000000000000000 5828721
16 111111111110000000000000000 2469947
17 1111111101100000000000000000 4005550
18 1011111111111000000000000000000 19917707
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Walter Trump, May 11 2022
STATUS
approved