A364680 Smallest initial number k of n consecutive numbers satisfying sigma(k) > sigma(k+1) > ... > sigma(k+n-1).

1, 4, 44, 44, 20021154, 20021154

Offset: 1

Author

Seiichi Manyama, Aug 02 2023

Keywords

• nonn
• more

Crossrefs

Cf. A000203, A075029.

Cf. A050944, A050945, A053226, A364657.

Programs

PARI

b(n) = my(k=n); while(sigma(k)>sigma(k+1), k++); k-n+1;
a(n) = my(k=1); while(b(k)