A253936 - OEIS

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A253936

a(n) = prime(n + (prime(n) mod 10)).

1

5, 11, 19, 31, 13, 23, 43, 59, 37, 67, 37, 67, 43, 59, 79, 67, 101, 67, 101, 73, 89, 127, 101, 137, 131, 103, 113, 149, 163, 137, 163, 137, 173, 191, 193, 157, 193, 179, 199, 191, 229, 191, 193, 211, 239, 257, 223, 233, 263, 277, 251, 283, 251, 257, 293, 277, 317, 277, 317, 283, 311, 313, 349, 313, 337, 367, 337, 379, 383

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..69.

Zak Seidov, Color graph for first 100 terms

FORMULA

a(n) = A000040(n + A010879(A000040(n))),

a(n) = A000040(n + A007652(n)).

EXAMPLE

n=1: p=prime(1)=2; p mod 10 = 2, prime(1+2) = 5 = a(1);

n=6: p=prime(6)=13; p mod 10 = 3, prime(6+3) = 23 = a(6).

MATHEMATICA

Table[Prime[n+Mod[Prime[n], 10]], {n, 100}]

PROG

(PARI) a(n)=prime(n+prime(n)%10)

CROSSREFS

Cf. A000040, A007652, A010879.

Sequence in context: A326665 A100920 A274946 * A191032 A003147 A106068

Adjacent sequences: A253933 A253934 A253935 * A253937 A253938 A253939

KEYWORD

nonn,base

AUTHOR

Zak Seidov, Jan 23 2015

STATUS

approved