103591

Properties

Appears in sequences

• Primes whose digit reversal is a pentagonal number (A000326).at n=26A115706
• Number of permutations of length n which avoid the patterns 1324, 3421, 4123.at n=15A116832
• Middle of 3 consecutive prime numbers such that p1*p2*p3 + d1 + d2 - 1 = average of twin prime pairs, d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=26A153404
• a(n) is the smallest number which can be represented as the sum of four distinct nonzero n-gonal numbers in exactly n ways, or -1 if no such number exists.at n=30A374274
• Prime numbersat n=9900