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A089056 Primes whose sum of digits [s(d)] is a prime and where sum of two such consecutive s(d) values is a square. 0
7, 11, 23, 29, 41, 131, 137, 197, 199, 467, 487, 557, 577, 593, 757, 773, 827, 829, 863, 881, 883, 937, 953, 1013, 1019, 1031, 1103, 1109, 1277, 1279, 1567, 1583, 1637, 1657, 1871, 1873, 2003, 2027, 2087, 2089, 2267, 2269, 2377, 2393, 2447, 2467, 2591, 2593 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subsequence of A046704.

LINKS

Table of n, a(n) for n=1..48.

FORMULA

From the sequence of primes whose s(d) values are prime, select those where sum of two consecutive s(d) values is a square.

EXAMPLE

a(2)=23; a(3)=29: 2+3=5; 2+9=11; 5+11=16, a square.

CROSSREFS

Cf. A046704.

Sequence in context: A182569 A067790 A271043 * A210981 A255769 A175625

Adjacent sequences:  A089053 A089054 A089055 * A089057 A089058 A089059

KEYWORD

easy,nonn,base

AUTHOR

Enoch Haga, Dec 20 2003

EXTENSIONS

Edited, corrected and extended by Ray Chandler, Feb 14 2004

STATUS

approved

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Last modified May 25 01:48 EDT 2019. Contains 323534 sequences. (Running on oeis4.)