

A109182


Numbers k such that the kth and (k+1)th primes have the same sum of squares of digits.


1



293, 2106, 2161, 2763, 3698, 3793, 3795, 3812, 3922, 3959, 3995, 4000, 4205, 4224, 4260, 4728, 4953, 5065, 5283, 5617, 5700, 5751, 5932, 6326, 6333, 6422, 6539, 6623, 7375, 7475, 7501, 7533, 7542, 8306, 8568, 8751, 8777, 8994, 9102, 9259, 9354, 9480
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OFFSET

1,1


COMMENTS

Most of the pairs of successive primes also have the same set of digits. Those with different sets of digits are in A109183; the first relative numbers k are 3795, 3995, 10234, 17125, 18134, 19322, 20979.


LINKS

Table of n, a(n) for n=1..42.


EXAMPLE

prime(293)=1913, prime(294)=1931; both have the same sum of digits squared: 1^2 + 9^2 + 1^2 + 3^2 = 1^2 + 9^2 + 3^2 + 1^2 = 92.


CROSSREFS

Cf. A109183.
Sequence in context: A217182 A109562 A023305 * A241047 A085502 A108828
Adjacent sequences: A109179 A109180 A109181 * A109183 A109184 A109185


KEYWORD

base,nonn


AUTHOR

Zak Seidov, Jun 21 2005


STATUS

approved



