A185107 a(n) is the first digit of prime(n) minus the sum of the other digits.

2, 3, 5, 7, 0, -2, -6, -8, -1, -7, 2, -4, 3, 1, -3, 2, -4, 5, -1, 6, 4, -2, 5, -1, 2, 0, -2, -6, -8, -3, -8, -3, -9, -11, -12, -5, -11, -8, -12, -9, -15, -8, -9, -11, -15, -17, 0, -3, -7, -9, -4, -10, -3, -4, -10, -7, -13

Offset

1,1

Comments

Absolute terms are the same as A042939.

Links

Table of n, a(n) for n=1..57.

Prog

(PARI) a(n) = {digs = digits(prime(n)); digs[1] - sum(i=2, #digs, digs[i]); } \\ Michel Marcus, Aug 30 2013

Crossrefs

Cf. A000040, A042939, A007605.

Sequence in context: A113566 A020775 A041000 * A042939 A115259 A039709

Adjacent sequences: A185104 A185105 A185106 * A185108 A185109 A185110

Keyword

sign,base,less

Author

Dario Piazzalunga, Dec 27 2012

Extensions

a(38) corrected by Michel Marcus, Jun 14 2022

Status

approved