A090431 Difference between sums of digits of n and n-th prime.

-1, -1, -2, -3, 3, 2, -1, -2, 4, -10, -2, -7, -1, -2, -5, -1, -6, 2, -3, -6, -7, -12, -6, -11, -9, 6, 5, 2, 1, -2, -6, 0, -5, -6, -6, 2, -3, 1, -2, -7, -12, -4, -4, -5, -8, -9, 7, 5, 2, -8, -2, -7, 1, 1, -4, 0, -5, 3, -2, -5, -6, -6, -1, 5, 4, 1, 6, 1, 1, -9, -3, -8, -6, -2

Offset

1,3

Comments

a(n) = A007953(n) - A007605(n);

a(A033549(n))=a(A049084(A033548(n)))=0; a(A049084(A090432(n)))<0; a(A049084(A090433(n)))>0.

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Prog

(Haskell)
a090431 n = a007953 n - a007605 n  -- Reinhard Zumkeller, Mar 16 2014

Crossrefs

Cf. A239324 (partial sums).

Sequence in context: A038529 A176259 A132312 * A107336 A282013 A275299

Adjacent sequences: A090428 A090429 A090430 * A090432 A090433 A090434

Keyword

sign,base

Author

Reinhard Zumkeller, Dec 01 2003

Status

approved