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A211006
Pair (n,p) where n is the sum of adjacent nonprimes and p is the sum of adjacent primes.
2
1, 5, 4, 5, 6, 7, 27, 11, 12, 13, 45, 17, 18, 19, 63, 23, 130, 29, 30, 31, 170, 37, 117, 41, 42, 43, 135, 47, 250, 53, 280, 59, 60, 61, 320, 67, 207, 71, 72, 73, 380, 79, 243, 83, 430, 89, 651, 97, 297, 101, 102, 103, 315, 107, 108, 109, 333, 113, 1560, 127, 387, 131
OFFSET
1,2
FORMULA
a(n) = A109921(n+2), n >= 3.
EXAMPLE
-----------------------------------------
. Array from
n A000027 a(n)
-----------------------------------------
1 1; 1
2 2, 3; 5
3 4; 4
4 5; 5
5 6; 6
6 7; 7
7 8, 9, 10; 27
8 11; 11
9 12; 12
10 13; 13
11 14, 15, 16; 45
12 17; 17
13 18; 18
14 19; 19
15 20, 21, 22; 63
16 23; 23
17 24, 25, 26, 27, 28; 130
CROSSREFS
Partial sums give A211007.
A variant of A109921.
Sequence in context: A113784 A021651 A200293 * A358789 A069214 A119807
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Aug 11 2012
STATUS
approved