A112667 a(n+1) is the sum of the units digit of a(n) and the square of the tens digit of a(n).

97, 88, 72, 51, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

Offset: 1

Author

N. J. A. Sloane, based on email from R. J. Mathar, Apr 04 2007

Keywords

• nonn
• base

Links

• K. Sengup, What is the next number in the series 97 88 72 51 26?.
• Index entries for linear recurrences with constant coefficients, signature (1).

Programs

Mathematica

nxt[n_]:=Module[{u=Last[IntegerDigits[n]],t=Floor[n/10]},u+t^2]; NestList[nxt,97,110] (* Harvey P. Dale, Oct 22 2013 *)