30603

Appears in sequences

• Base-10 palindromes that starts with 3.at n=28A043038
• Palindromes with exactly 3 palindromic prime factors (counted with multiplicity).at n=21A046377
• Palindromes expressible as the sum of 3 consecutive palindromes.at n=23A046498
• 3p^2 where p runs through the primes.at n=25A079705
• a(n) = concatenate(n, A010888(2*n), reverse(n)), where A010888 = digital root.at n=29A082944
• a(1) = 2; then smallest palindrome > 1 not occurring earlier such that every partial concatenation is a prime.at n=24A088086
• Palindromes in which the sum of the internal digits = the sum of the external digits.at n=18A088285
• Odd numbers k such that A166100((k-1)/2)/k is not an integer.at n=28A166102
• Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers (without the dots).at n=25A210890
• Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers. Leading zeros of the terms are suppressed.at n=24A210892
• Antidiagonal sums of the convolution array A213768.at n=14A213770
• Palindromic composite numbers starting with a digit 3.at n=20A222726
• 3*h^2, where h is an odd integer not divisible by 3.at n=33A229852
• Number of partitions of subsets of {1,...,n}, where consecutive integers and the elements in {1, n} are required to be in different parts.at n=9A261489
• Numbers that are the sum of three squares in arithmetic progression.at n=42A292313
• Numbers p^2*q, p > q odd primes such that q divides p+1.at n=19A350245
• Expansion of (1/x) * Series_Reversion( x * (1-x) * (1-x^3)^3 ).at n=9A369299
• G.f. A(x) satisfies A(x) = (1 + x*A(x)^2 / (1-x))^3.at n=5A371522
• Consecutive states of the linear congruential pseudo-random number generator 259*s mod 2^15 when started at s=1.at n=7A384194