OFFSET
1,1
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..7920
EXAMPLE
From M. F. Hasler, Apr 08 2023: (Start)
From 112 we can get 1*12 = 12 and 11*2 = 22, then 1*2 = 2 and 2*2 = 4.
All smaller numbers have only one possible outcome: for n = 111 the only possible outcome is 1, for 99 < n < 111, the outcome is always 0, and for 2-digit numbers there is only one possibility for the split-and-multiply operation and the result is always smaller than the initial value. (End)
MATHEMATICA
-1 + Position[#, 2][[All, 1]] &@ Flatten@ Array[Map[Total, Transpose@ ImageData[ColorNegate@ Import["https://oeis.org/A361338/a361338_2.png", "PNG"], "Bit"][[10 # + 1 ;; 10 # + 10, 1 ;; 1000]]] &, 1, 0] (* Michael De Vlieger, Apr 06 2023, using image at A361338 *)
PROG
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Apr 05 2023
STATUS
approved